Like I said I have thousands more, I remember having more holos and somee rare trainers and energys, but I only listed the ones I consider in mint condition. If we were to assume the vast majority of the boxed cards are common/uncommon, can someone give me a rough estimate of my total value?

A guy at a card shop here in town yesterday told me that he wouldnt give me more than $20, but I noticed he had the same Dark Dragonite set in worse condition for $100 and I very rudely told him to shove it up it a$$. I had never realized before that Pokemon cards would sell for so much! Thanks in advance for whoever helps me with this